748 



NEW YORK STATE MUSEUM 



young had not begun to appear May 29. The young may be 

 expected in the latitude of Yonkers about the middle of May 

 and later; and thorough spraying at intervals of about a week, 

 as long as the young appear, with kerosene emulsion, diluted 

 with nine parts of water, will probably be found very effective 

 in checking this pest. Aim to cover every part of the infested 

 tree with the insecticide. 



The small Lecanium nigrofasciatum Perg. has 

 proved a rather serious enemy to soft maples in Albany. This 

 scale insect has been so abundant on some small trees as nearlv 



Fig. 19 Pseudococcus aceris: a adult female ; & antenna of same; c adult male; d young 

 larva ; c antenna of same— a, c, d greatly enlarged ; b, e still more enlarged. (After Howard, Insect 



life. 1894. 7 : 237) 



to cover the under surface of the limbs, and so much honeydew 

 was exuded that the walks beneath were kept moist. The 

 severe drain on the trees prevented much growth and resulted 

 in killing a number of the smaller limbs. Badly infested twigs 

 have a marked sour, semiputrid odor due in all probability to the 

 decomposition of the honeydew. Young began to appear in 

 Albany about June 14, and by July 15 they were about .5 mm 

 long and were thickly set on the smaller twigs (pi. 4, fig. 2). 



